Microsoft released Security Advisory 975497 that provides information about a new, irresponsibly reported vulnerability in SMB 2.0 and affects Windows Vista, Windows Server 2008 and Windows 7 RC. Windows 7 RTM, Windows Server 2008 R2, Windows XP and Windows 2000 are not affected by this vulnerability. The Security Advisory outlines steps that Windows Vista and Windows Server 2008 customers can take to help protect themselves while we work on a security update for this issue.